The Ubuntu TV interface is a Desktop Environment designed to emulate (and built on top of a fork of) the Unity-2D. Since the Unity interface is Canonical's consistent user experience in the computing world the thought of re-designing Ubuntu TV to mimic other Desktop Environments will likely not be on the short list of goals for Ubuntu TV.

Only time will tell, but other DE maintainers such as KDE, XFCE, etc may develop and modify the Ubuntu TV to mimic their style Destkop Environment.